The year is 2008. A rich businessman named Victor Lynx is planning on taking a vacation with his family. When he arrives home, however, his family is mysteriously missing. He finds a note on his desk telling him to go to the basement. There, he finds his wife and his daughter chained to a chair. Victor soon finds the person who is responsible, but he quickly notices that something is wrong. The person who tortured Victor's loved ones is a hybrid between a horse and a human. The horse does not want to reveal why he did it, though; all he tells Victor is that he has a personal problem with him. Not long after telling him, the horse kills Victor's family, leaving the man emotionally scarred.

Three years later, the horse returns, but this time, he isn't alone. He has taken an entire army with him, and he's out for blood. To combat him, a team of six people called the 'Busters' is created, including Victor, his best friend Tim, and an assassin named Yuzo. However, not everything is the way it seems, and soon enough, the world is no longer at peace. A bloody war has begun.